Lumber-loading jack.



PATENTED DEG. l0, 1907.

G. RYPKEMA. y LUMBBR LOADING JACK. APPLICATION FILED 1113.28, 1907.

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UNITED sTATEs PATENT oEEioE.

GERRIT RYPKEMA, OF WICHERT, ILLINOIS, ASSIGNOR OF ONE-HALF TO PETER J. OLAUSSEN. OF CHICAGO, ILLINOIS.

LUMBER-LOADING J ACK.

i Specification of Letters Patent.

Patented Dec. 10, 1907.

Appiiaaon flied rebmry 28,1907. semi No. 359,758.

To all whom it may concern:

Beit known that I, GERRIT RYPKEMA, citi- Zen of the United States, residing at Wichert, in the county of Kankakee and State of Illinois, have invented certain new and useful Improvements in Lumber-Loading Jacks, of which the following is a specification.

This invention is a lumber loading jack, adapted to be fixed in or attached to the doorways of freight cars or buildings for the purpose of protecting the door from injury and for providing or supporting rollers in convenient position so that the lumber may be rolled in thereon through the doorway.

The invention comprises means whereby the ack may be placed at any height desired in the doorway and also whereby an outer roller may be supported at any angle so that the lumber may be conveniently loaded or unloaded from above or below.

The invention is illustrated in the accompanying drawings, in which Figure 1 is a plan view thereof. an end view, Fig. 3 is a section on 3-3 of Fig. 1.

Referring specifically to the drawings, the door jambs to which the ack is attached are indicated at A. At 1 are indicated heads which are jammed or clamped against the door jamb to hold the jack in position. These heads are connected by a rod 12, made in sections, joined at the adjacent ends by a turnbuclle 14, by means of which the heads may be tightened or loosenedwith respect to the jambs.A At each side of each head is an arm 2O carrying an upright roller 4, which serves to prevent the boards or timbers from catching or scraping against the door jamb when they are passed through the door at an angle.

The heads support an inner roller 3 therebetween. This roller is hollow and has at the ends rods 10 which project through caps 9 on the ends of the roller and rest at their projecting ends in bearings formed in the heads. The rods are extensible to accommodate the roller to doorways of different widths, and are fixed at adjustment by means of set screws 11 which extend through the caps and bear against the rods. So the rods may be extended or retracted to proper length to rest at the ends in the bearings referred to.

Mounted upon the ends of the spacing rods l2 are sleeves l5 provided at their outer ends with ratchet teeth 21 which engage corre- Fig. 2 is the line spending teeth at the adjacent ends of bosses or projections 15a on the sides of the heads 1, and these bosses have sockets in which the ends of the rods l2 are fitted and fixed. The position of the sleeves 15 upon the rods 12 may be varied, and they are fixed as set by means of collars 13 and set screws 16. By loosening the screws the collars may be slipped back and the sleeves slid along until their teeth are disengaged, thereby permitting the sleeves to be turned on the rods.

At 5 are indicated arms which are bent around the sleeves 15 and clamped thereto by bolts 22. The outer ends of these arms are slotted as at '7 and supportl extensible sections 6, which are also slotted and which are adjustable in or out on the arms by means of the slots and the connecting bolts 8.

The outer ends of the arms 6 support a roller 2, which is similar in construction to the roller 3 heretofore referred to. That is, it has rods 10 extensible endwise therefrom, and caps 9, and screws 11 to fix the rods as set. The outer ends of the rods rest in bearings on the outer ends of the arm sections 6.

By means of the sleeve and ratchet devices between the headsl the arms 5 may be set or inclined at any angle desired,thus supporting the roller 2 on a level with, or above or below, the roller 3. Thus, in loading a car from below, the roller 2 will be placed somewhat lower, so that a piece of timber may be rolled up over the rollers 2 and 3 into the car. And the same in unloading a car to a lower position. In loading or unloading from or to a higher position the roller 2 will be raised to the proper angle.

When the device is to be applied to a doorway the turnbuckle is turned to press-the heads against the door jambs and fix the jack in place at the desired height or position. The arms 5 are then set at the desired angle. The rollers 2 and 3 are then adjusted by means of their pivot rods to the necessary length, and placed in the bearings, and the device is then ready for the use intended.

I claim:

1. A lumber jack having, in combination, a pair of heads connected together and having laterally extending arms provided with upright rollers, and a horizontal roller extending between the heads and supported at its ends in bearings thereon.

2. A lumber jack having, in combination, an extensible support arranged to engage g avance door jambs or the like at opposite ends, a eXtensible rollers respectively carried be- 10 pair of arms projecting Jfrom said support tween the heads and between the arms. and adjustable to various angles in a Vertical Irl-testimony whereoil I aHiX my signature, plane7 jancll a roller carried between the outer in presence of two witnesses. ends o t e arms.

3. A lumber jack having, in combination, GERRIT RYPKEMA a pair of heads, a screw rod connecting the Witnesses:

same, arms projecting from the rod and ad- H. G. BATCHELOR,

instable angularly with respect thereto, and PETER Ll. CLAUssEN. 

